I may not have understood the point you were trying to make by bringing up the idea that mass shootings are a suicidal action. The line of reasoning that I believe we’ve been discussing is whether antidepressant use, or abrupt cessation of use, increases the likelihood of a mass shooting. As I see it, as far as suicidality is concerned, the line of reasoning has gone like this:
- Increased suicidality is a known side effect of some antidepressants
- Mass shootings are also suicidal acts
- Therefore, the suicidal nature of mass shootings means that the increased suicidality also contributes to the increased likelihood of mass shooting
In my mind, that is contradicted by the fact that most suicides don’t involve mass shootings.
If that’s not the point you were trying to make, then I misunderstood and would appreciate clarification.
You seem to be saying that I have said that antidepressants DON’T or CANNOT cause or contribute to mass shootings. I don’t believe I’ve said that. It’s possible that they do. I’m saying I haven’t seen sufficient evidence to cause me to come to that conclusion.
...
According to the Violence Project website, 31% of mass shooters were suicidal prior to the attack, 40% became suicidal during the attack, and 59% died on the scene.
Again, separating suicidal tendencies from an increase in violent thoughts is not supported by the evidence.
https://www.theviolenceproject.org/key-findings/
Is it really your belief that someone with new suicidal thoughts is possibly experiencing side effects from the psychotropic drugs,
but it's not JUST AS LIKELY that someone with thoughts of mass murder or other acts of violence are also experiencing drug side effects?
Mass shootings are public spectacles of violence intended as final acts. Whether it’s
self-inflicted, or comes at the hands of police officers, or after life in prison, a mass
shooting is a form of suicide. Traditional preventive measures like increased armed
security or harsh criminal sentences will do little to stop them.

You said "In my mind, that is contradicted by the fact that most suicides don’t involve mass shootings."
What, precisely, is the percentage needed to go from "most don't have this behavior, so the theory has no basis," to "a portion of people in a given group are committing suicide at rates higher than the general population, so there may be some validity to the theory that X is a factor in those individual outcomes?"
Not all drug addicts commit crimes to be able to buy drugs, therefore the premise that drug addiction is an underlying factor in increased crime is "contradictory."
Not all serial killers were abused as children, therefore the premise that severe child abuse may be an underlying factor in developing serial killers is "contradictory."
Not everyone who watches porn -- particularly that which depicts rape and S&M -- go on to become rapists, therefore the premise that rapists may have been influenced by videos and images depicting such acts is "contradictory."
Another analogy would be, "Not everyone who goes to Ivey League Schools become rich and successful, therefore the theory that attending such a school is a factor in how some graduates became rich and successful is contradictory."